On unitized systems, the nozzles and manifold block constitute a single drop-in unit. The melt channel runs from the manifold block directly to the nozzle without any potential misalignment or dead spots. Any potential for plastic leakage between the nozzles and the manifold block is eliminated since the nozzles are inserted within the manifold by a thread connection.

This eliminates the tendency for plastic leaks between the nozzles and manifold, which can occur during heat expansion of conventional bushing-type system designs. Production is then interrupted in order to effect repair.

Unitized systems are centered in the injection mold with minimal contacts made of materials that are poor heat conductors and do not require any clamping or pre-tensioning of the mold plates. The minimal contact in unitized systems provides highly accurate and stable temperature profiles, with energy consumption substantially below that for conventional systems .

The design of unitized systems makes it possible to install prewired hydraulic connections directly on the system, independent of the mold to be used. The hydraulic mechanism driving the valve gate also can be mounted directly on the system, making the injection mold more flexible and enabling it to be used on machines without additional control valves. The electrical and hydraulic connections are configured to customer specifications.

All the systems undergo electrical continuity, temperature and pneumatic or hydraulic tests prior to delivery. The customer thus obtains a checked, ready-to-install system that can be easily assembled in the mold and brought directly into operation.

When routine maintenance needs to be performed on the system or the mold, the unitized system can be removed from the mold again by this same simple procedure. It can then be tested or repaired independently of the mold.